Recently, NXP Semiconductors N.V. (Nasdaq: NXPI) announced the launch of a next-generation battery controller IC designed to optimize the performance and safety of battery management systems (BMS). The new product, named MC33774, is an 18-channel analog front-end device that can provide cell measurement accuracy as low as 0.8 mV and excellent cell balancing force over a wide temperature range. MC33774 supports functional safety level ASIL-D, which is especially suitable for high-voltage lithium-ion batteries that are closely related to safety, and can fully utilize the available capacity.
Lithium-ion batteries are widely used in electric vehicles due to their high energy density, low self-discharge rate, low maintenance costs and ability to withstand thousands of charge and discharge cycles. Batteries typically account for 30% to 40% of the total cost of an electric vehicle. Generally speaking, an 800V lithium-ion battery system consists of approximately 200 individual battery cells connected in series. Accurately estimating a battery pack’s state of charge (SoC) at any given temperature and instant in time is critical over the pack’s multi-year lifecycle. MC33774 can provide accurate battery measurement data throughout the life cycle in the full temperature range of -40°C to +125°C, enabling highly accurate mileage prediction.
Li Xiaohe, vice president and general manager of the new energy and drive system product line at NXP, said: "MC33774 has undergone a rigorous design and verification process to ensure its safety and reliability in automotive applications. This includes testing through system-level verification Electromagnetic compatibility, electrostatic discharge performance, transient immunity and communication reliability in harsh scenarios. MC33774 is designed to reduce the cost of OEM systems while maintaining their reliability, ensuring that the electric vehicle industry can achieve success even with short development cycles It also allows the car to be put on the market safely.”
MC33774 uses NXP's SmartMOS SOI (silicon on insulator) technology and has battery measurement accuracy as low as ±0.8 mV, which can effectively protect the life performance of battery chemistries such as nickel manganese cobalt (NCM) and lithium iron phosphate (LFP). NXP MC33774 also uses precision design and calibration technology, which can save customers the cost of end-of-line inspection (EOL) calibration.
The MC33774 is part of NXP's high-voltage BMS chipset solution, which also includes future products such as the MC33777, a battery junction box controller for pack-level measurements, and the already released MC33665 battery management communication gateway. This comprehensive and powerful BMS system solution enables successful battery system development the first time and strives to avoid on-site accidents. Production-grade software and functional safety libraries are also included in the design package to help speed functional safety development and reduce system cost.
The launch of NXP's MC33774 battery controller IC is designed to improve the performance and safety of battery management systems, while also speeding up development and reducing system costs.
First of all, MC33774 adopts NXP's SmartMOS SOI technology, which can provide battery measurement accuracy as low as ±0.8 mV, effectively protecting the life performance of battery chemical materials. This means that the battery’s state-of-charge can be more accurately estimated over the life of the battery pack, allowing for highly accurate range predictions. This helps improve the overall performance of electric vehicles and reduces energy waste caused by inaccurate battery charge and discharge states.
Secondly, MC33774 supports functional safety level ASIL-D, which is especially suitable for high-voltage lithium-ion batteries that are closely related to safety. This means that the MC33774 has been rigorously verified and tested in harsh automotive application environments to ensure its performance in terms of safety and reliability. This helps reduce risk and cost during development and speeds time to market.
In addition, MC33774 also adopts precision design and calibration technology, which can save customers the cost of end-of-line inspection (EOL) calibration. This means customers can produce and test products faster, reduce production costs, and increase production efficiency.
NXP's MC33774 battery controller IC brings significant advantages to the electric vehicle industry by improving performance and safety, speeding development, and reducing system cost. This will help promote the popularity and development of electric vehicles and play an important role in energy conservation and emission reduction.
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